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KMID : 0900919950190020147
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Korean journal of Animal Reproduction
1995 Volume.19 No. 2 p.147 ~ p.152
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Effects of Different Hormone Treatments on the Estrus Synchronization and Superovulation of Gilts I. Effects of Altrenogest and PG600 Treatments on the Estrus Synchronization of Gilts
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Park Jin-Ki
Lee J. H.
Kim Do-Hyeong
Lee Hoon-Taek
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Abstract
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The purpose of this study was to examine the estrus synchronization and superovulation of pigs with hormone treatments. Three different kinds of procedures for synchronization and superovulation were used as follow: I) gilts in natural estrus behavior (control): 2) gilts synchronized with 20mg altrenogest for 9 days regardless of the estrus cycle; 3) gilts received PG600 (400IU PMSG + 200 IU hCG) in 15 day of the estrus cycle; and then gilts administrated with PMSG (1,500 IU) and hCG (750 IU) after altrenogest and PG600 treatment for superovulation. Estrus was checked daily with a boar, in estrus synchronization, the intervals from hormone treatment to estrus were different between PG600 (43/47) and altrenogest (13/53) within 6 days. The percentage of animals displaying a estrus response were not different by hormone treatments. The average number of corpora lutea (C.L) and ovulated embryos were similar between PG600 25.4{pm}13.1, 19.0pm12.8 and altrenogest 25.5{pm}0.7, 15.0{pm}4.2, respectively, but was increased (P<0.05) by hormone treatment compared to that 12.9{pm}1.8, 12.7{pm}3.9 in the control. The number of normal embryos after ovulation was higher in the control than hormone treatment. Therefore, these results suggest that altrenogest and PG600 treatment could be a valuable for cut down the labour and cost by synchronization.
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KEYWORD
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